31234431310212 has 96 divisors (see below), whose sum is σ = 83312705008512. Its totient is φ = 9022480828416.

The previous prime is 31234431310211. The next prime is 31234431310219. The reversal of 31234431310212 is 21201313443213.

It is a self number, because there is not a number n which added to its sum of digits gives 31234431310212.

It is not an unprimeable number, because it can be changed into a prime (31234431310211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13780518 + ... + 15886205.

It is an arithmetic number, because the mean of its divisors is an integer number (867840677172).

Almost surely, 2^{31234431310212} is an apocalyptic number.

It is an amenable number.

31234431310212 is an abundant number, since it is smaller than the sum of its proper divisors (52078273698300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31234431310212 is a wasteful number, since it uses less digits than its factorization.

31234431310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29667157 (or 29667155 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 31234431310212 its reverse (21201313443213), we get a palindrome (52435744753425).

The spelling of 31234431310212 in words is "thirty-one trillion, two hundred thirty-four billion, four hundred thirty-one million, three hundred ten thousand, two hundred twelve".